Airports, airspace and airlines can operate independently of each other and that market forces will keep them aligned. This is not happening.
Yep, not only in Perth.
The fix is turn Pearce into a multi user facility the same as Darwin and Townsville and extend the Midland rail line through Ellenbrook to Pearce.
Nice option.
Another option might be hubbing from the eastern states through ADL and/or ASP. MEL/SYD > AD > WA, SYD/BNE > AS > WA. Opens another market for labour and the transit times, in many cases, would be less.
There is no doubt that infrastructure has lagged well behind what is required, so my read is that ASA are saying "let's work together to have a manageable option (as the current system is unsustainable)".